Nitazoxanide 500 mg is an antiparasitic and antiviral medication commonly used to treat infections caused by protozoa, helminths, and certain viruses. It is effective against conditions like giardiasis, cryptosporidiosis, and some intestinal infections. Nitazoxanide works by inhibiting the growth of microorganisms, helping the body clear the infection. It is often well-tolerated, with mild side effects such as nausea or abdominal discomfort in some cases. Always use this medication under the guidance of a healthcare provider to ensure proper dosing and effectiveness for your specific condition.